linux-kernel - Re: [PATCH 16/17] tools lib traceevent: Unregister handler when scsi plugin unloaded

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Message-ID: <20140115153626.79977c6b@gandalf.local.home>
Date:	Wed, 15 Jan 2014 15:36:26 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 16/17] tools lib traceevent: Unregister handler when
 scsi plugin unloaded

On Wed, 15 Jan 2014 10:45:39 +0900
Namhyung Kim <namhyung@...nel.org> wrote:

> The function handler should be unregistered when the plugin unloaded
> otherwise it'll try to access invalid memory.
> 
> Cc: Jiri Olsa <jolsa@...hat.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/lib/traceevent/plugin_scsi.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/tools/lib/traceevent/plugin_scsi.c b/tools/lib/traceevent/plugin_scsi.c
> index 6fb8e3e3fcad..64d688534518 100644
> --- a/tools/lib/traceevent/plugin_scsi.c
> +++ b/tools/lib/traceevent/plugin_scsi.c
> @@ -421,3 +421,10 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
>  				       PEVENT_FUNC_ARG_VOID);
>  	return 0;
>  }
> +
> +void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
> +{
> +	pevent_unregister_print_function(pevent,
> +					 process_scsi_trace_parse_cdb,
> +					 "scsi_trace_parse_cdb");
> +}

Seems we have a trend ;-)

Same for patch 17.

-- Steve

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